Extension methods to clear Linq

    var entities = await DbContext.SomeEntities
        .NewerThan( query.UpdatedSince )
        .ByIdAsync( query.Id );

    public static IQueryable<SomeEntity> Hankintapaatosehdotukset( this IQueryable<SomeEntity> source, DateTime updatedSince )
    {
        return source.Where( e => e.UpdatedSince >= updatedSince );
    }

    public static async Task<SomeEntity> ByIdAsync( this IQueryable<SomeEntity> source, long id )
    {
        var entity = await source.SingleOrDefaultAsync( t => t.Id == id );
        if ( entity == null ) { throw new NotFoundException( $"Entity not found with ID: {id}" ); }
        return entity;
    }